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Mathematics 8 Online
OpenStudy (anonymous):

solve the system of equations using the addition method. state whether the system is consistent or inconsistent. if it is consistent state whether it is dependent or independent. 5x +y = 9 10x-7y=-18

OpenStudy (saifoo.khan):

Multiply the first equation by -2.

OpenStudy (anonymous):

why

OpenStudy (saifoo.khan):

So that you can cancel out one of the variables. x or y.

OpenStudy (anonymous):

so i do 5x *-2?

OpenStudy (saifoo.khan):

-2 ( 5x +y = 9) whole equation

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